Writing instrument



FIG. 1 is a perspective view showing my new design for a writing instrument;

FIG. 2 is a front view of the writing instrument of FIG. 1;

FIG. 3 is a left side view of the writing instrument of FIG. 1, the right side view being a mirror image thereof;

FIG. 4 is a rear view of the writing instrument of FIG. 1;

FIG. 5 is a top plan view of the writing instrument of FIG. 1; and,

FIG. 6 is a bottom plan view of the writing instrument of FIG. 1.

The dashed lines are for illustrative purposes only and form no part of the claimed design.

The broken lines showing of an eraser at the top of the writing instrument are for the purpose of illustrating environmental matter and form no part of the claimed design.

In addition, the stippling on the grip represents texture. 

The ornamental design for a writing instrument, as shown and described. 